93 FJZ80 with CE Code 83,84, & 85

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idcruiserboy

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My families ride is not riding too well. Idle is very low and the volt meter drops along with the headlights diming when i come to a stop light or stop in traffic and idle. When i give it gas the volt meter jumps up and lights brighten.. I bought a new battery hoping this would fix the prob. but no luck.
I just did a diagnostic test and received codes 83,84, & 85.
I understand this to be an open or shorted ECM or circuit.
Any ideas where to start?
Is this a symptom of a bad alternator?
thanks
IDcruiserboy

93 FJZ80
 

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